I guess this is just for use against insurgents with off-the-shelf quadcopters? Parrot was likely not designing its quadcopters with air-tight security in mind.

I guess this is just for use against insurgents with off-the-shelf quadcopters? Parrot was likely not designing its quadcopters with air-tight security in mind. Civil UAVs are unlikely to be attacked and, worst comes to worst, losing the occasional quadcopter is just a cost of business. Military-grade UAVs, on the other hand, are going to be designed with an expectation that they'll be attacked by sophisticated opponents. Finding exploits would be tough, as the link would probably be encrypted and the design would be secret.